Hoisting apparatus.



H. C. WARNITZ.

HOISTING APPARATUS. APPLICATION FILED JUNE 22,1911.

Patented Mar. 26, 1912..

COLUMBIA PLANMRAPH 00-. WASHINGTON. D. c.

HENRY CLEARLY WARNITZ, 0F PROVIDENCE, RHODE ISLAND.

HOISTING APPARATUS.

Specification of Letters Patent.

Application filed June 22, 1911.

Patented Mar. 26, 1912.

Serial No. 634,743.

To all whom it may concern:

Be it known that I, HENRY G. WARNITZ, a citizen of the United States,residing at Providence, in the county of Providence and State of RhodeIsland, have invented certain new and useful Improvements in HoistingApparatus; and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same. I

This invention relates to improvements in hoisting apparatus.

One object of the'invention is to provide a hoisting apparatus which isparticularly adapted for use in connection in hoisting metal plates orsheets and having an improved construction and arrangement of hoistinghooks and means for securely fastening said hooks in engagement with theplates or other material to be hoisted whereby the hooks will not bereadily disengaged from the material while being hoisted.

WVith this and other objects in view the invention consists of certainnovel features of construction, combination and arrangement of part-s aswill be more fully described and particularly pointed out in theappended claim.

In the accompanying drawings: Figure 1 is a side view of my improvedhoisting apparatus showing the same in operation; Fig. 2 is an enlargedperspective view of one of the material engaging hooks of the apparatus;Fig. 3 is an enlarged vertical sectional view through one of the hooksand a portion of the material to be hoisted showing the manner in whichthe hook is engaged with-the material. a

In the embodiment of the invention, I provide a pair of hooks 1 each ofwhich is preferably formed from a single bar of metal bent upon itselfmidway between its ends to form the bill 2 of the hook, said bill beingpreferably flattened and extended to form a broad surface for engagementwith the material to be hoisted. The ends of the bar after forming thebill of the hook extend rearwardly in parallel relation and are bentupwardly and forwardly to form the shanks 3 of the hook, said shankshaving in their ends eyes 4. The eyes 4 are preferably formed in theends of the bar before the same is bent to form the bill and shanks ofthe hook.

Arranged between the ends of the shanks 3 and pivotally connected withthe eyes 4 by a pivot bolt 5 is a gripping member 6,

said member being preferably in the form of a block having a taperedmaterial engaging inner end and having on its outer end an eve 7 ring 8.The material engaging ends of the gripping members 6 are preferablyhardened in any suitable manner to prevent the wearing of said ends fromrepeated engagement with the material being hoisted. Adapted to beinserted through the rings 8 of the material grip-ping members 6 is acombined hoisting and hook operating chain 9 the ends of which aredetachably secured to a connecting ring 10 to which the main hoistingchain or cable is connected. I

When thus constructed and arranged the flat bills of the hooks areengaged with the under side of the opposite edges of the plates or othermaterial to be hoisted, while the inner, ends of the gripping members 6are engaged with the upper side of the plates or other material at apoint approximately above the point where the bills of the hooks engagethe lower surfaces of the plates or other material whereby when thelatter are lifted the weight of the same on the chain 9 will cause thechain by means of the rings 8 to force the inner ends of the grippingmembers into tight engagement with the material thus firmly clamping thelatter between said members and the bills of the hooks whereby saidhooks will be prevented from being casually disengaged from the materialshould the latter or the hooks come into engagement with an obstructionwhile the material is being hoisted. By arranging the gripping membersso that the ends of the same will engage the upper side of the materialabove the point of engagement of the bills of the hooks with the lowerside thereof the gripping members or the bills of the hooks will beprevented from indenting or bending the material when engaged therewith.By connecting the hooks with the chain 9 in the manner described thehooks will be kept in operativeengagement with the material if thelatter should bend and the space between the hooks thus be shortened asthe loose engagement of the chain with the rings 8 will permit the chainto slip through the rings and thus take up any slack which 'might occurtherein by the bendingof the plates or material engaged by the hooks. It

in which is arranged a hook attaching will also be noted that byconstructing and arranging the gripping members as herein described thatthe heavier the load to be lifted, the tighter said members will begripped or engaged with the same. By detachably connecting the ends ofthe chain 9 with the ring 10 the chain may be readily removed and ashorter or longer chain engaged with the hooks and with said connectingring whereby the apparatus may be adjusted for hoisting material orobjects of different sizes.

From the foregoing description taken in connection with the accompanyingdrawings, the construction and operation of the invention will bereadily understood with out requiring a more extended explanation.

Various changes in the form, proportion and the minor details ofconstruction may be resorted to without departing from the principle orsacrificing any of the advantages of the invention as defined in theappended claim.

Having thus described my invention, what I claim is: v

In a hoisting apparatus a pair of work engaging hooks, said hooks beingformed from bars bent midway between their ends to form the bill of thehooks, said bills being flattened to form material engaging surfaces,said ends of the bars after forming the bill being bent upon themselvesto form the shanks of the hooks, eyes formed on the ends of said shankswork gripping members pivotally mounted in the eyes of said shankswhereby the inner ends of said members are adapted to engage thematerial above the points where the same is engaged on its lower side bythe bills of the hooks, eyes formed in the outer ends of said materialgripping members, rings arranged in said eyes of the gripping members, acombined hook operating and hoisting chain having a loose engagementwith said rings, and a connecting ring adapted to detachably connect theends of the chain together.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

HENRY CHARLY lVARNITZ.

lVitnesses WILLIAM J. VVARNITZ, JOHN L. C. DIEMES.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

